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Mylonite Rock



Definition

Definition
Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism

History

Origin
New Zealand

Discoverer
Unknown

Etymology
From Greek mulōn mill + -ite

Class
Metamorphic Rocks

Sub-Class
Durable Rock, Medium Hardness Rock

Family

Group
-

Other Categories
Fine Grained Rock, Opaque Rock

Texture

Texture
Foliated

Color
Black to Grey

Maintenance
Less

Durability
Durable

Water Resistant
Yes

Scratch Resistant
Yes

Stain Resistant
No

Wind Resistant
No

Acid Resistant
No

Appearance
Dull, Banded and Foilated

Uses

Architecture

Interior Uses
Decorative Aggregates, Interior Decoration

Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration

Other Architectural Uses
Curbing

Industry

Construction Industry
for Road Aggregate, Landscaping, Roadstone

Medical Industry
-

Antiquity Uses
Artifacts, Monuments

Other Uses

Commercial Uses
Creating Artwork, Gemstone, Jewelry

Types

Types
Blastomylonites, Ultramylonites and Phyllonites

Features
Surfaces are often shiny

Archaeological Significance

Monuments
-

Famous Monuments
-

Sculpture
-

Famous Sculptures
-

Pictographs
-

Petroglyphs
-

Figurines
-

Fossils
Absent

Formation

Formation
Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain, in ductile fault zones.

Composition

Mineral Content
Porphyroblasts

Compound Content
Aluminium Oxide, Calcium Sulfate, Chromium(III) Oxide, Iron(III) Oxide, Magnesium Carbonate, Silicon Dioxide

Transformation

Metamorphism
No

Types of Metamorphism
-

Weathering
Yes

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion
Yes

Types of Erosion
Chemical Erosion, Sea Erosion, Wind Erosion

Properties

Physical Properties

Hardness
3-4

Grain Size
Fine Grained

Fracture
Conchoidal

Streak
White

Porosity
Highly Porous

Luster
Shiny

Compressive Strength
1.28 N/mm2 48

Cleavage
Conchoidal

Toughness
-

Specific Gravity
2.97-3.05

Transparency
Opaque

Density
2.6-4.8 g/cm3

Thermal Properties

Specific Heat Capacity
1.50 kJ/Kg K 3

Resistance
Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia
China, India, Indonesia, Saudi Arabia, South Korea

Africa
Eritrea, Ethiopia, Ghana, South Africa, Western Africa

Europe
England, Finland, France, Germany, Great Britain, Greece, United Kingdom

Others
-

Deposits in Western Continents

North America
USA

South America
-

Deposits in Oceania Continent

Australia
Central Australia, Western Australia

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Metamorphic Rocks

Information about Mylonite

Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Mylonite Uses. We have provided you with all information about Mylonite rock here. Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism. Mylonite is available in black to grey colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Mylonite is white. Get to know more about Mylonite rock and characteristics of Mylonite rock in the next sections.

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